Joseph zeefas



UNITED STATES PATENT OFFICE.

JOSEPH ZERFAS, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND ANDREWBERGER, OF SAME PLACE.

LOCKING-LATCH.

SPECIFICATION forming part Of Letters Patent No. 266,947, dated October31, 1882. Application filed May 3, 188d. (Model.)

To all whom it may concern:

Be it known that I, JOSEPH ZERFAS, of the city, county, and State of NewYork, have invented certain new and useful Improvements in Locks, ofwhich thefollowing is a specification.

This invention has reference to an improved lock for refrigerators,meat-safes, closets, and similar inclosures; and it consists of a'casinghaving a faceplate with a circular opening, through which a. sphericalbolt of somewhat larger diameter than the opening is forced by means ofa spring applied to the inner portion of the bolt and to a fixed ing ofthe casing,

the bolt being used in connection with means for locking or releasingit, as will be more fully described hereinafter, and finally be pointedout in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsection of my improved ,lock; Fig. 2, a side view, and Fig. 3 an' endview, of the same.

Similar letters of reference indicate corresponding-parts.

A represents the casing or main plate ofthe lock, to which is riveted orotherwise attached the face-plate B at right angles thereto. Theface-plate B is provided with a circular opening, a, through which alockingbolt, 0, of

0 spherical shape, butof a slightly larger diameter, is forced by thepressure of a spiral spring, C. This spiral spring may be directlyapplied to the inner part of the spherical bolt within the face-plate B,and to a fixed lug, b, of the 5 main plate A; or it may be applied toacupshaped support, D, of the bolt B, the shank of which is guided inthe lug b, as shown in Fig. 2. Aspring-pressed tumbler, E, is pivoted tothe main plate, and adapted to engage by a 40 projection, d, notches (1d of a locking-disk, F. The tumbler E extends downward back of the disk,as shown in the drawings. The disk F is centrally pivoted to a fixedpin, e, and is turned by means of a key, which also raises 5 the tumblerE in the usual manner, so as to throw either a recess,f, of smallerdepth, or a recess,f, of greater depth, into line with the any othersimilarrdoor, so that when the door is shut the spherical bolt will bethrown by its spring into the opening a of the said jambplate. It willthen be found that while the force of the spring 0 holds the sphericalbolt (3 in position in the opening a sutficiently to keep the doorclosed, still by reason of the elasticity of the spring 0 and by reasonof I the rolling motion of the spherical bolt 0 the door can be easilypulled open and be as easily shut again, the spring 0 always bringingback the spherical bolt 0 to its place in the openings (1 and a of theface and jamb plates.

In the act of opening or closing the door the spherical bolt (J isforced back, and therewith also the shank of its cup D, said shankentering into the deeper slotf ot' the disk F. It'it be desired to lockthe door, the spherical bolt 0 is retained in its position by throwingthe shorter recess f of disk F in line with the shank of the cup, asshown in Fig. 2. The bolt 0 will thus be locked, because the disk F isin such a position that the shank of the bolt' supporting cup D cannotmove backward. By a reverse motion of the key the disk F is returned tothe position shown in Fig. 1, in which position the bolt may be pressedback with its spring and the door opened or closed, as desired.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. A locking device consisting of a supporting-stemthe shank end of which is guided by a perforated lug, while the otherend is 0 enlarged and provided with a concave recess fitted to receive aspherical bolt, a spiral spring one end of which presses against theenlarged part of the stem, while the other end presses against the lug,a locking-disk, and a In testimony that I claim the foregoing as tumbleroperated in'connection with the disk, my invention I have signed my namein pressubstantially as described.

2. The combination of a main plate, A, face- 5 plate B, having circularopening a, spherical bolt 0, cup D, spiral spring-O, perforated lug b,spring-pressed tumbler E, having projection d, and locking-disk F,having notches d d, f, andf, substantially as described.

ence of two subscribing witnesses.

JOSEPH ZERFAS.

Witnesses:

CARL KARP, ALFRED MosER.

